Thomas Aquinas (1224-1274) is one of the most important thinkers in the history of western civilization. A philosopher and theologian, a priest and preacher, Aquinas bequeathed to the world an enduring synthesis of philosophy, theology, and Christian spirituality. Aquinas championed the integration of faith and action, sound doctrine and right living, orthodoxy and orthopraxy. From the thirteenth century through the present day, his legacy has...